Abrading apparatus



Jan. 4,1938; L PEI K 2,104,055

' iABRADyING APPARATUS I Filed Aug. 23,1935 2 Sheets-Sheet 1 ATTORNEYS Patented Jan. 4, 1938 PATENT OFFICE 2,104,055 ABRADING armres Louis D. Peilr, Mls'hawaka, Ind., assig'nor-to The American Foundry Equipment Company, Mlshawaka, Ind., a corporation of Delaware Application August 23, 1933, SerialNo. 886,382

. 2 Claims. (01. 51-9;

The invention relates to aorading apparatus,

and more particularly to a combinationof tumbling apparatus and abrasive projector.

In the past,apparatus has been used wherein articles are treated by tumbling and at the same time a current of air carrying abrasive is discharged from nozzles upon the articles which are undergoing treatment. v

In accordance with the present invention, tumbling apparatus (for instance apparatus similar to that described and claimed in Patent No.

1,882,442 for a 'IumblingMill, granted to me October 11, 1932) is combined with a mechanical abrasive projector, for instance, apparatus similar to that disclosed in my co-pending application, Serial-No. 685,025, filed August 14, 1933), so that abrasive, without an appreciable quantity of accompanying air, is projected against the articles which are being treated. Thus, the present apparatus reduces the cost and minimlzes the disadvantages of known combined tumbling and abrading apparatus. The cushioning action of air upon the abrasive is eliminated, because in the present apparatus the abrasive stream is not carried by airpwhich impinges upon the articles under treatment, is there compressed, and then reversed in its direction of travel with the result that it opposes the projection of the abrasive against the articles under treatment. Furthermore, the problem of disposing of large volumes of air, projected into the tumbling apparatus with the. abrasive, is disposed of by means of the present invention. Finally a very much greater quantity of abrasive can be projected in a given time with a given size of projector and a given input of power, with an airiess" projector than is possible where an air stream is employed'to carry the abrasive.

Llhe invention also consists in certain new and original features of construction and combinations of parts hereinafter set forth and claimed.

Although the novel features which are believed to be characteristic of this invention will be particularly pointed out in the claims appended hereto, the invention itself, as to its objects and advantages, andthe manner in which it may be carried out, may be better understood by referring to the following description taken in connection with the accompanying drawings forming a part thereof, in which- Fig. l is a plan view-of an apparatus constructed in accordance with the invention.

illultratedinm. 1.

.the conveyor. the conduit It. A tube II is provi ded adjacent Fig. 3 is-a side elevation of the apparatus as viewed from the right in Fig. 2.

Fig.4 is an enlarged section on the line Ill-IV of Fig. 3, and

Fig. 5 is an enlarged section on the line V- V.

of Fig. 2.

In the following description and claims various details will be identified by speciflcnames for convenience, but they are intended to be as generic in their application as the art will permit. Like reference characters denote like parts in the severalfigures of the drawings.

In the drawings accompanying and forming part of this specification, certain specific disclosure of the invention is made for purposes of explanation, but it will be understoodthat the details may be modified in various respects without departure from the broad aspect of the invention.

Referring now more particularly to the drawings, it will be seen that they show a casing lll within which there is positioned a movable endless seginented belt il mounted on sprocket wheels II, II, II, all as illustrated and described in the aforesaid Patent No. 1,882,442. An

' abrasive receiving pan II is disposed between the veyed by the latter to a point from which it may.

be reused.

An abrasive storage tank I8 is disposed above the low point of the conveyor l1 and a conduit It carries abrasive therefrom to the low point of A valve 20 may be positioned in the upper part of theconveyor l I for carrying abrasive from the conveyor to an abrasive procentral portion thereof. A series of blades 15 extend from this central circular space 24 to the periphery of the projector and when the projector is whirled rapidly about its axis, any abraslve coming into the central circular space 24 will be thrown outwardly and projected from the wheeLas it revolves. 'A shield member 2! prevents the abrasive, coming to the projector, from the tumbler; but no obstruction is present between the projector and the tumbler. Thus, the

abrasive is thrown into the tumbler and against mounted on top of the casing i0, rotates a pulley 3!, which through a belt 32 operates a second pulley 33 for driving movable belt. II. The worm conveyor I6 is driven from the conveyor I! as will be obvious from Fig. 4.

The movablebelt H is driven from a gear wheel 34, keyed to the shaft of the second pulley 33, which meshes with a gear wheel 35 on the shaft which carries the sprocket wheel l3. The sprocket wheels I! and I4 merely idle, and the movable segment turns them as it is driven from shown in Fig. 4, by means of a belt 40, a pulleythe sprocket wheel I3. Obviously, other drive means might be employed for the movable segment.

A motor 39 drives the mechanical abrasive projector 22 in a counter-clockwise direction, as

4| and a shaft 42, as will be readily seen by ferring to Fig. lot the drawings.

In operation the tumbler is moved in a counter-clockwise direction as seen in Fig. 5, the articles therein tending to move upwardly to the right and falling downwardly again as their angle of repose upon the movable belt ll is exceeded. The mechanical abrasive projector receives abrasive in its central circular. space 24, and being whirled about, projects the abrasive through its throwing blades 25. Such abrasiveas is projected away from the tumbler is received by the guard.

26 and permitted thereby to fall into the tumbler. Abrasive projected into the tumbler strikes the articles being tumbled therein and cleans them. When a batch has been satisfactorily cleaned in the tumbler, the motor 39 is stopped, thereby stopping the projector; a door 43 at, the

front of the tumbler is opened; the motion of the movable belt II is reversed; and the articles are moved out of the tumbler.

Abrasive to replace that which has been used up is supplied through the tube l9, ashas already been indicated by the description of the apparatus.

It will be readily seen that the abrasive 'blast continually acts 'over the entire width of the tumbling apparatus. This is not possible where air nozzles project a series of jets into a tumbler or onto a revolving platform where the articles commoner.

LOUIS D; PEIK.

2,104,056 being thrown out of the apparatus and away from intermittently and repeatedly are subjected to the action of jets of abrasive material.

The apparatus herein described has been found I to have ,great practical advantages over known apparatus for tumbling articles and at the same time cleaning them with a stream of abrasive.

. Articles may be cleaned in the present apparatus more thoroughly, in far less time, than has heretofore been possible; and a marked saving in power has been made.

While certain novel features ofthe invention have been disclosed and are pointed out in the annexed claims, it will be understood that various omissions, substitutions and changes may be made by those skilled in the art without departing fro the spiritof the invention. 1

' What is claimed is: e

1. In a metal cleaning and tumbling apparatus, in combination, side walls, an endless conveyor belt adapted to describe an erect a cylinder in its line of travel, said arm forming a chamber with said side walls, means for driving said belt and an abrasive throwing wheel above the chamber formed by said belt and side walls, said wheel being rotated in a plane transverse of the direction of motion of said belt, whereby abrasive will be distributed over the entire width of said belt from one of the side walls to the other.

2. An apparatus for cleaning metal castings and the like comprising a cleaning chamber, an endless conveyor mounted in saidchamber for supporting castings to be cleaned, means for vertical travel back onto that portion of the con-' veyor traveling in a horizontal direction, and a centrifugal abrasive throwing wheel mounted in said chamber above the horizontal reach of said conveyor with its axis so positioned that the wheel rotates in a plane transverse to the direction of travel of said conveyor, whereby the abrasive discharged therefrom is directed in a concentrated stream having a sweep coextensive with the width of said conveyor against the various surfaces of the castings to be cleaned as they repeatedly travel for said limited distances, in a horizontal direction.

LOUIS 1). Pink.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 2, secdnd' 'co1umn, 1ine 21, forthe-word. "arm" read er or-end that the eaidvLetters Patent shouldflbe read with this correction therein that the sam form to the record of the case inthe Patent Office.

e may con- Signed and sealed this 8th day of February, n. 19

(seall Henry Van Arsdale, Acting Commissionerof Patents.

the tumbler; but no obstruction is present between the projector and the tumbler. Thus, the

abrasive is thrown into the tumbler and against mounted on top of the casing i0, rotates a pulley 3!, which through a belt 32 operates a second pulley 33 for driving movable belt. II. The worm conveyor I6 is driven from the conveyor I! as will be obvious from Fig. 4.

The movablebelt H is driven from a gear wheel 34, keyed to the shaft of the second pulley 33, which meshes with a gear wheel 35 on the shaft which carries the sprocket wheel l3. The sprocket wheels I! and I4 merely idle, and the movable segment turns them as it is driven from shown in Fig. 4, by means of a belt 40, a pulleythe sprocket wheel I3. Obviously, other drive means might be employed for the movable segment.

A motor 39 drives the mechanical abrasive projector 22 in a counter-clockwise direction, as

4| and a shaft 42, as will be readily seen by ferring to Fig. lot the drawings.

In operation the tumbler is moved in a counter-clockwise direction as seen in Fig. 5, the articles therein tending to move upwardly to the right and falling downwardly again as their angle of repose upon the movable belt ll is exceeded. The mechanical abrasive projector receives abrasive in its central circular. space 24, and being whirled about, projects the abrasive through its throwing blades 25. Such abrasiveas is projected away from the tumbler is received by the guard.

26 and permitted thereby to fall into the tumbler. Abrasive projected into the tumbler strikes the articles being tumbled therein and cleans them. When a batch has been satisfactorily cleaned in the tumbler, the motor 39 is stopped, thereby stopping the projector; a door 43 at, the

front of the tumbler is opened; the motion of the movable belt II is reversed; and the articles are moved out of the tumbler.

Abrasive to replace that which has been used up is supplied through the tube l9, ashas already been indicated by the description of the apparatus.

It will be readily seen that the abrasive 'blast continually acts 'over the entire width of the tumbling apparatus. This is not possible where air nozzles project a series of jets into a tumbler or onto a revolving platform where the articles commoner.

LOUIS D; PEIK.

2,104,056 being thrown out of the apparatus and away from intermittently and repeatedly are subjected to the action of jets of abrasive material.

The apparatus herein described has been found I to have ,great practical advantages over known apparatus for tumbling articles and at the same time cleaning them with a stream of abrasive.

. Articles may be cleaned in the present apparatus more thoroughly, in far less time, than has heretofore been possible; and a marked saving in power has been made.

While certain novel features ofthe invention have been disclosed and are pointed out in the annexed claims, it will be understood that various omissions, substitutions and changes may be made by those skilled in the art without departing fro the spiritof the invention. 1

' What is claimed is: e

1. In a metal cleaning and tumbling apparatus, in combination, side walls, an endless conveyor belt adapted to describe an erect a cylinder in its line of travel, said arm forming a chamber with said side walls, means for driving said belt and an abrasive throwing wheel above the chamber formed by said belt and side walls, said wheel being rotated in a plane transverse of the direction of motion of said belt, whereby abrasive will be distributed over the entire width of said belt from one of the side walls to the other.

2. An apparatus for cleaning metal castings and the like comprising a cleaning chamber, an endless conveyor mounted in saidchamber for supporting castings to be cleaned, means for vertical travel back onto that portion of the con-' veyor traveling in a horizontal direction, and a centrifugal abrasive throwing wheel mounted in said chamber above the horizontal reach of said conveyor with its axis so positioned that the wheel rotates in a plane transverse to the direction of travel of said conveyor, whereby the abrasive discharged therefrom is directed in a concentrated stream having a sweep coextensive with the width of said conveyor against the various surfaces of the castings to be cleaned as they repeatedly travel for said limited distances, in a horizontal direction.

LOUIS 1). Pink.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 2, secdnd' 'co1umn, 1ine 21, forthe-word. "arm" read er or-end that the eaidvLetters Patent shouldflbe read with this correction therein that the sam form to the record of the case inthe Patent Office.

e may con- Signed and sealed this 8th day of February, n. 19

(seall Henry Van Arsdale, Acting Commissionerof Patents. 

